Efficient extraction of sulfate from water using a Zr-metal–organic framework

Abstract

A Zr-based MOF, NU-1000, comprised of Zr6 nodes and tetratopic pyrene-containing linkers is studied for adsorption and extraction of SO4(2-) from water. The adsorption capacity and uptake time of SO4(2-) in NU-1000 is determined at varying concentrations to give an overall maximum adsorption capacity of 56 mg SO4(2-) per g of MOF. Selective adsorption of SO4(2-) by NU-1000 in the presence of other anions as well as regeneration of the sorbent is also explored.

Anion-exchanged and quaternary ammonium functionalized MIL-101-Cr metal-organic framework (MOF) for ReO4−/TcO4− sequestration from groundwater

“…MOFs have been investigated over the last two decades primarily for gas adsorption (e.g., hydrogen storage, acetylene separation, and carbon dioxide capture), light harvesting and energy storage, efficient sensors, catalysis, and drug-delivery systems (Furukawa et al, 2013;Li et al, 2012). Recently, zeolitic imidazolate frameworks (ZIFs), zirconium-based frameworks, and several other MOFs have demonstrated chemically stability in aqueous media over a wide pH range 0−14 (Bosch et al, 2014;Howarth et al, 2016a;Wang et al, 2016), and have a high capacity for removing arsenate, selenate and selenite, sulfate, and other oxyanions from aqueous systems (Deng et al, 2019;Desai et al, 2016;Howarth et al, 2015a;Howarth et al, 2015b;Howarth et al, 2016b). These recent findings open a very attractive avenue for MOF applications for environmental remediation of various contaminants (Mon et al, 2018) and nuclear waste treatment (Banerjee et al, 2016b;Dolgopolova et al, 2018).…”

Structural, morphological and optical properties of cobalt-substituted MgMoO4 ceramics prepared by pyrolysis of citric acid precursors

“…Molybdates, which also have interesting physical properties [3], are widely used in various industrial sectors. Metal molybdates of monoclinic structures have many potential applications involving, for example, photoluminescence, semiconductor lasers, magnets, lithium-ion batteries, microwaves, catalysts, and photoelectric devices [4][5][6][7][8][9][10].…”

Effective removal of chemical warfare agent simulants using water stable metal–organic frameworks: mechanistic study and structure–property correlation

“…Among several methods to remove toxic chemicals, adsorptive removal is signicant, due to its simple operation and cost effectiveness. 34,[41][42][43][44][45][46][47][48][49] There are few reports where MOFs are used for this purpose, but the mechanism of these types of adsorption processes is still ambiguous. In the present work, we have used Zr-based MOFs (NU-1000 and UiO-67) for the efficient adsorption and removal of CWA simulants, (or namely) 2-CEES and DMMP from the aqueous medium.…”